Fresh water generator maintenance
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The document provides guidelines for maintaining a fresh water generator (FWG) on a vessel: 1. Check the salinity alarm monthly to ensure only fresh water enters the fresh water tank. 2. Stop the FWG when approaching contaminated waters to prevent bacterial infection. 3. Open the separator shell and inspect for scale during scheduled maintenance or if production drops. 4. Clean the heating tubes twice a year or when production drops to prevent scale buildup.
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Legionella bacteria can grow in water systems provided with organic matter like scale, rust, sludge or amoebae. Tank cleaning and disinfection is important for managing risks but does not need to be annual in many cases. According to guidance, cleaning should occur when inspections show it is necessary, such as after contamination or plumbing work. For average non-drinking water systems, cleaning may only be needed every 3-5 years depending on factors like turnover and silt. More frequent cleaning could be required based on risk assessments.
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Enclosed space entry procedures
Enclosed space entry procedures involve assessing risks, issuing permits, conducting toolbox meetings, testing atmospheres, using gas monitors, communicating with those on watch, having safety equipment available, maintaining ventilation, and evacuating if conditions deteriorate. Additional precautions are required when atmospheres are unsafe, including only entering if essential, wearing breathing apparatus and rescue harnesses attached to lifelines, and having hoisting equipment ready in case of emergency.
Mooring procedures checklist
The document provides a checklist for mooring a vessel, with 19 steps:
1. Establish communication between the mooring station and bridge.
2. Prepare mooring winches by running them in advance to warm hydraulic fluid.
3. The master discusses and informs the mooring station of the mooring plan.
Safe lifting practices
The document provides recommendations for safe lifting practices on board ships to ensure safety of personnel and equipment. Key recommendations include:
1. Ensuring lifting plants are of adequate design, construction, strength and free of defects for their intended use and properly maintained through preventive maintenance and inspection.
2. Operating lifting plants safely within their rated capacity and only by authorized and trained personnel.
3. Taking precautions like secure anchoring and positioning of counterweights to ensure stability during lifting and clearly marking controls.
4. Reporting any lifting equipment defects immediately and properly overhauling and testing lifting gear on a regular schedule.
Important initial checks of oily water separator
The document provides guidance for important initial checks the incoming Chief Engineer must perform on the Oily Water Separator (OWS) during handover from the previous Chief Engineer. The checks include verifying the Oily Content Monitor (OCM) system time is set properly to UTC, conducting a 15ppm alarm simulation test to ensure proper functioning, replacing any OCM backup batteries older than 2 years, and checking that OCM history matches timings recorded in the Oil Record Book.
Continuous machinery survey
Continuous Machinery Survey (CMS) is a program that allows shipowners to spread required machinery surveys over a five year period, with approximately 20% of machinery inspected each year. This helps balance workloads, downtime, and maintenance costs. The Chief Engineer is responsible for inspecting and recording items on the survey schedule. Records of inspections must be presented to the attending surveyor. Certain key systems and safety devices must still be verified personally by the surveyor during annual inspections. CMS allows for more efficient planning of inspections, maintenance, and inventory of spare parts over a five year period.
Batteries checking and maintenance
Batteries on ships require regular maintenance to ensure proper functioning. There are two types - wet or flooded batteries which require liquid level checks and replenishment, and sealed batteries which do not. Checks include measuring terminal voltage and specific gravity to determine charge state, and visual inspections. Batteries last longest when kept above 50% charge; ones charging only to 70% should be replaced. Floating charges keep batteries highly charged to prevent discharge, and chargers should be tested regularly. Deteriorated batteries should be stored safely until disposal.
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Fresh water generator maintenance
- 1. marineprohelp.com One Answer: Fresh Water Generator maintenance What are correct maintenance practices for Fresh Water Generator? Always give a priority to the Maker's manual. Following guidelines should be used as reference only. 1. Check Salinity Alarm The salinity alarm or salinity indicator needs regular checks as it allows only pure fresh water to flow into the fresh water tank and critical for FWG operation. The electrodes of salinity alarm must be cleaned on monthly
- 2. basis to remove dust or scale deposits. Alarm settings must be verified before putting the Fresh Water Generation system into operation after cleaning. 2. Stop Fresh Water Generator properly and at a right time When a vessel approaches a port, land or estuary, the Fresh Water Generator must be stopped as at such places the sea water is heavily infected with bacteria and contaminated. 3. Open Separator shell as per PMS or when production drops The separator shell and heat exchanger covers can be opened up and inspected during scheduled inspections for scale formation or if cooling tubes are fouled with any sludge formation. As per recommended in Safety Management System Manual or Flag State Requirements, the Fresh Water Tanks are generally cleaned once in six months or on yearly basis. 4. Clean the Heating Tubes as per PMS or when production drops Cleaning or descaling of the inside of heating tubes should be made twice or three times in a year physically or dissolved by chemical methods. Scaling can be prolonged by not operating the plant at contaminated water areas such as in harbors or ports. 5. Use scale inhibitors
- 3. Scale inhibitors are used to prevent scale formation by dispersing scale deposits and delaying reaction. This also prevents scale deposits from adhering to heat transfer surfaces. Scale formation inside heat exchanger requires cleaning if specific temperatures cannot be obtained for inlet and outlet of fresh water. 6. Repair damaged coating In case coating inside the fresh water generator is damaged, the damaged covering is to be scraped off and the surface should be then thoroughly dried. After putting the undercoat on the steel surface, epoxy- resin or food coating (as prescribed by FWG manufacturer) is to be applied. 7. Inspect Impeller Periodically The impeller of ejector pump wears out and its surface also gets damaged due to high-speed revolution. This is inevitable due to continuous operation of the pump. The condition of the impeller should thus be inspected periodically. 8. Keep the FWG daily production log The FWG production log is very important for early detection of production drop which means that Fresh Water Generator requires cleaning. 9. Monitor the FWG vacuum
- 4. If vacuum inside the FWG decreased this may indicate the worn ejector pump or insufficient sealing of the casing.